c-- c-j ccc ccj ccm cco ccr cjc cjr cmc cmj cmm cmo cmr co- coc coj com coo cor crc crj crm cro crr jcc jcm jco jcr jjc jjj jjr jmc jmj jmm jmo jmr joc joj jom joo jor jrc jrm jro jrr m-o m-r mc- mcc mcm mco mcr mjc mjj mjm mjr mmc mmj mmm mmo mmr moc mom moo mor mrc mrj mrm mro mrr oc- occ ocj ocm oco ocr ojc ojm ojo om- omc omj omm omo omr oo- ooc oom ooo oor or- orc orm oro orr rcc rcj rcm rco rcr rjc rjm rjr rmc rmm rmo rmr roc roj rom roo ror rrc rrm rrr